A stylish, sophisticated set of buttons and icons optimized for dark backgrounds. Completely scaleable, flexible and easy to be modified through layer styles. The typface used is the Helvetica Neue LT 75 Bold and Helvetica Neue LT Std 45 Light which you can buy here: http://fontshop.com/search/?q=Helvetica+Neue&x=0&y=0
The layer styles are optimized for each form (e.g. the gradiants applied are linear or radial depending of each form). Beside of gradients the buttons have a pattern layer slightly applied.